Various, Punch, or the London Charivari…
“ X must stay.""Of course," said the G.O.C. Demobs, or, as he is more often called, "Mobbles." "He stays because he doesn't go.""Yes," said the Adjutant's child full, like the elephant's child, of insatiable curiosity, "X stays because he is retained for selection until he is selected for retention, or, to put it more clearly, he belongs to a class which could go if it had any reason for going and if it wanted to go and wasn't retained as eligible or wasn't eligible for retention. In other words he is in one of the two classes—those who are available to go and those who are eligible to stay." ”
